Incandescent electric lamp



(No Model.) 2 SheetSheet 1.

, E. KAYE.

INGANDESGBNT ELECTRIC LAMP.

No. 530,895. Patented Dec. 11,1894.

' awe/a "cams PETERS co woraurn 9m b e .6 h 4 s t e e h S 2 (No Model.)ELKAYE. INCANDESGENT ELBGTRIG LAMP.

No. 530.895. Patented Dec. 11,1894.

no STATES ATENT: 0mm.

INCANDESCENT ELECTRIC LAMP.

SPECIFICATION forming part of Letters Patent No. 530,895, dated December11, 1894.

Application filed February 4, 1893 Renewed November 10,1894:- Serial No.528.430. (No model.)

To aZZ whom it may concern.-

Be it known that I, EDWARD KAYE, a citizen of the United States,residing at Monaca, in the county of Beaver and State of Pennsylvania,have invented certain new and useful Improvements in IncandescentElectric Lamps; and I do hereby declare the following to bea full,clear, and exact description of the nvention, such as will enable othersskilled in the art to which it appertains to make and use the same.

My invention has relation to electric lightmg by incandescence, and hasfor its object the provision of a novel form and construction of bulband appurtenant parts for the reception of the filament.

In the bulbs in general use in lighting by incandescence, the leading-inwires to which the filament is secured have been sealed in a glasscylindrical section, stopple or cane, and the latter has been sealed byfusion with the body of the bulb, so as to constitute with the latter asingle integral piece of glass, but the process of sealing theleading-in wires in the glass of the stopple and subsequently sealmg thelatter to thebody of the bulb by fusion is difficult and costly, as itnecessitates the employment ofhighly skilled artisans and the output ofeach worker is at best comparatively small, owing to the complexity ofthe operation and the percentage of loss in breakage due to the fragilecharacter of the material and parts operated on.

The sealing of the leading-in wires and the fusion of the stopple orcane to the body of the bulb are ordinarily done at the electric lampfactory, the bulbs being manufactured at the glass factory andaccordingly two forces of skilled glass-workers are necessarilyemployed.

In carrying my invention into effect I propose to prepare the body ofthe bulb and a plug or stopple with the leading-in wires embedded andsealed therein at the glass house or manufactory, and to furnish theseparts ready for the attachment and insertion of the filament and thecreation of the vacuum to hands skilled in that branch of manufacture,the construction of the body of the bulb, the plug or stopple andappurtenant parts being such, according to my improvements, that theplug or stopple can be readily and speedily inserted in position andsecurely sealed to the body of the bulb without fusion of any of theparts or particularly skillful manipulation. I further propose to soconstruct the bulb and the stopple that these parts can be made to suchsize and in such manner that they may be-taken apart for the replacementof abroken filament, or that either may be replaced when damaged orbroken bya similar piece taken from stock. My invention consists in thenovel construction, combinations and arrangements of parts hereinafterdescribed and claimed.

In the accompanying drawings, Figure 1 is alongitudinal sectional viewof my improved lamp or bulb and its appurtenant parts joined together;Fig. 2, a side elevation showing the bulb and the plug or stoppledetached and .ready for attachment; Fig. 3, a side elevation of thevitreous portion of the plug or stopple with the leading-in wires sealedin position; Fig. 4, a top view of'the stopple. Fig. 5, is a verticalcentral section of the lamp inserted in a socket. A, designates the bodyof the bulb, and B, the neck of the same. A shoulderb is formed on theneck B, and a gasket 0, of rubber or other suitable material surroundsthe neck and seats against this shoulder. Below the shoulder 19, ascrew-thread d is formed on and integral with the neck B, and the end ofthe neck is ground flat, forming a seat for a second gasket D, similarto the gasket 0, but of somewhat smaller diameter.

E, designates the plug or stopple which is in form a hollow cone of suchwidth at the base as that the latter will fit neatly into the open neckof the bulb.

F, F, designate the leading-in wires which pass through the hollowcenter of the plug or stopple and are sealed therein by heating theglass at the narrow end of the plug until it is soft, and thencompressing it against and around the wires. r

A flange G, is formed on the plug at its base, and when the plug is inposition in the bulb the gasket D, lies between this flange and theground end of the neck of the bulb.

H, designates a collar or cap made preferably of spun metal and with ascrew thread on its inside adapted to engage the screwthread (1 on theneck of the bulb. A lateral flange h, is formed on the edge of the capand when the latter is screwed onto the neck of the bulb, the gasket Cis compressed between this flange and the shoulder 12, on the neck.

The end of the collar or cap H, has a hole I: in its center throughwhich the leading-in wires may pass and one of these wires may besoldered to the cap and the latter, being spun with ascrew-thread, asbefore described, may be screwed into a lamp socket of the ordinarycharacter. The thread on the inside of the cap which engages with thethread on the neck of the bulb being spun or pressed in the cap isprojected on the outside of the same and constitutes a thread which willengage with a screw-threaded socket or holder M, as shown in Fig. 5, ofthe drawings.

The parts being constructed as described are put together in thefollowing manner: The plug or stopple first has the leading-in Wiressealed into it in the manner hereinbefore described, and the gasket 0,is placed in position on the neck B. A small quantity of soft plaster ofparis, or other plastic material, is placed in the bottom of thecollaror cap H, and the plug or stopple is pressed down on the plastic,the flange G, sinking into the plastic and the latter rising around theedges and spreadingover the top of the flange. The gasket D, is thenpassed down over the conical part of the plug and upon the top of theflange, and adheres to the plastic thereon. The filament is attached'tothe leading-in wires after the plug or stopple has been secured in thecap in the manner described and the plug and its filament are securelyattached to, and sealed in, the bulb by screwing the cap on the neck ofthe bulb, thus bringing the flange on the edge of the cap into contactwith the gasket O, and the ground end of the neck of the bulb intocontact with the gasket D. If desired, the hollow center of the plug maybe filled with a suitable plastic material. After the plug and filamentare attached in position, as described, the vacuum is established in theordinary manner, thus completing the manufacture of the bulb.

Having described my invention, I claim- 1. In an incandescent electriclamp, the combination of a bulb having a threaded neck and shoulder, anda stopple or plug having a flange, leading in wires sealed in said plugand a filament connected to said wires, with a cap screwing on said neckand gaskets fitting against the shoulder and the end of the neck, saidcap being constructed and adapted to fit into a lamp socket,substantially as described.

2. An incandescent electric lamp, having a threaded neck, in combinationwith a removable plug or stopple and a cap threaded interiorly to screwonto said neck and threaded exteriorly to screw into a lamp socket,substantially as described.

3. An incandescent electric lamp, com prising a bulb, a plug or stopplehaving leading in wires sealed therein, and connected to theincandescing filament, and a cap or ferrule securing said plug and bulbtogether, and constructed and adapted to fitinto alamp socket andforming the connection between the lamp and the socket, to which socketit is mechanically connected orcoupled,substantially as described.

4. An incandescent electric lamp, comprising a bulb having a neck, aplug orstopple inserted in said neck and formed with a flange at itsbase, leadingin wires sealed in said plug or stopple and connected tothe incandescing filament and a cap or ferrule which covers said flangeand connects the bulb and plug together, said cap or ferrule beingelectrically connected to the filament and constructed and adapted tofit into a lamp socket to which it is mechanically connected or coupled.

5. An incandescent electric lamp, comprising a bulb having a neck, atubular plug or stopple inserted in said neck and formed with anoutwardly projecting flange, leading in wire inserted and sealed in saidplug and connected to an incandescing filament and a cap or ferrulecovering said flange and connecting the bulb and plug together, said capon ferrule being electrically connected to the filament and adapted tofit into a lamp socket and to be mechanically coupled orinterlockedtherewith.

6. An incandescent electric lamp, comprising a bulb having a neck, aplug or stopple inserted in said neck, and having a widened base,leading in wires sealed in said plug and connected to an incandescentfilament, and a metallic. cap or ferrule secured to said neck andconnecting said bulb and plug together, said cap or ferrule beingelectrically connected to the filament and constructed and adapted tofit intoa lamp socket and to be mechanically coupled or interlockedtherewith.

7. Au incandescent electric lamp, comprising a bulb having a neck,a plugorstoppleinserted in said neck and detachable therefrom, leading inwires sealed in said plug and connected to an incandescing filament, anda cap or ferrule covering the base of said plug and detachably securedto the neck of the bulb, said cap or ferrule being electricallyconnected to the filament and constructed and adapted to fit into a lampsocket and electrically connect the filament and socket and providedwith means for mechanically coupling or interlocking the cap and sockettogether.

8. An incandescent electric lamp, comprising a bulb having a screwthreaded neck, a screw threaded metallic ferrule fitted on said neck,and a hollow glass plug or stopple fitting within said neck and held inplace by said ferrule, said plug or stopple having one end open and theother end closed and holding the leading in wires, substantially asdescribed.

In testimony whereofI alfix my signature in presence of two witnesses.

EDWARD KAYE.

Witnesses:

A. M. J OHNSON, H. J. SPEYEDE.

